First, the classification of disciplines is different.
1, scale
Acari, also known as ticks, ticks and beans, belongs to Arthropoda, Arachnida and Acari.
2. Fleas
Flea, commonly known as leather, belongs to arthropod, Insecta and Flea.
Second, the morphological characteristics are different.
1, scale
The worm is oval, with a flat abdomen and a slightly raised back when it is not sucking blood. The adult is 2 ~10mm long. After full of blood, it swells like red beans or castor beans, and the largest can be as long as 30 mm, with a cortex on the surface and a shell shield on the back. Insects are divided into jaws and bodies.
2. Fleas
Adults are tiny or short, wingless, hard and flat, with thick and short antennae. The mouth is sharp, used for sucking, the abdomen is wide, with 9 knots, and the hind legs are developed and stout.
Third, different living habits.
1, scale
Ticks are ectoparasites of human beings, domestic animals and wild animals, and larvae, nymphs and adults can suck blood. Ixodes mostly bite the host during the day and suck blood for a long time, while soft ticks mostly suck blood at night and bite the host for a short time. Ticks are often selectively parasitic on the host's parasitic parts, generally in parts with thin skin that are not easily scratched. For example, Ixodes persulcatus parasitizes in the neck, behind the ears, armpits, inner thighs, genitals, groin and other parts of animals or people.
2. Fleas
The host selectivity and blood-sucking specificity of various fleas are not so strict. Some fleas have a wide range of hosts (such as pioneers), so they can change hosts frequently. It spreads through burrowing, gregarious, hunting and seasonal migration of rodents. Fleas also have the habit of actively leaving the original host to find a new host. In addition, they are good at jumping (maximum 19.7 cm, maximum 33 cm). When Jane Eyre epidemic caused a large number of infected mice to die, they actively searched for new hosts, endangering human beings. Fleas can often spread around with the activities of rodents, and can also be spread from one place to another through the transportation of goods and luggage.
For different flea species, the habitat habits of adults are different. There are two types of fleas: hairy fleas and nest fleas. Hairy fleas, such as pioneers, dog fleas, cat fleas, etc., live in the host cluster, suck blood frequently, have poor hunger tolerance and require high temperature. The flea-collecting type is mostly parasitic in the nest of the host, with less blood-sucking times, strong hunger tolerance and low temperature requirements. There are often a lot of fleas in the nest, and most of the fleas parasitic on wild rats belong to this type.
Baidu Encyclopedia-Acari
Baidu encyclopedia-flea